1. The Higher Educational Key Laboratory for Measuring and Control Technology and Instrumentations of Heilongjiang Province, Harbin University of Science and Technology, Harbin 150080, China
2. Murdoch University Chiropractic Clinic, Murdoch University, Murdoch 6150, Australia
3. Faculty of Life Science and Education, University of South Wales, Treforest, Pontypridd CF37 1DL, UK
4. Faculty of Health Sciences, Durban University of Technology, Durban 1334, South Africa